Amethyst and Pyrargyrite Physical Properties

Amethyst

Pyrargyrite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

insoluble in common solvents

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.655.85

1 7.18

1.5 Fracture

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

Conchoidal, Uneven, ConchoidalArthur Thomas, Brittle

1.6 Cleavage

Indiscernible

Distinct on {10 1 1}, imperfect on {01 1 2}

1.7 Mohs Hardness

72.5-3

2 10

1.8 Chemical Composition

SiO₂

Ag 3SbS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Amethyst and Pyrargyrite Chemical Formula

While comparing Amethyst and Pyrargyrite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Amethyst and Pyrargyrite chemical formula.

Chemical formula of Amethyst- SiO₂
Chemical formula of Pyrargyrite- Ag 3SbS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Amethyst and Pyrargyrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Amethyst and Pyrargyrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Amethyst and Pyrargyrite Optical Properties during the identification of gemstone. Specific gravity of Amethyst is 5.85 whereas that of Pyrargyrite is 5.85.